{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbb768b7e4a406015e3113072b39f9acaee483f836a42ca61912813c2f4456bfa",
    "signature": "0x00c57db09cf022f3f9f0538d0fef61f85ca2ca1831cab94c9e1d51a8c8b4e1ef5baa5f780222801c42a574a0994e5879e568e1ece75fcf7c56b30503a12d830b1b",
    "signer": "0xe6fbE11B11b240a0DF37662956fd7EfAF03A3aeD",
    "userId": "438156740"
  }
}