{
  "manageEntity": {
    "action": "Save",
    "entityId": "75613154",
    "entityType": "Track",
    "nonce": "0x0215f5b0cfa173718c41db167d52ad4f035365a7d8537d9a09aa5dd2269b3299",
    "signature": "0x2e220e2d5a9332c0f47e3d5f82bb60820f9a3f87b567513258ed06b0fff98947718ac10a15b85d2f7c1bbcf6856cf6f84d733e2ddcfd0ab7a75ae13c060463b11c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}