{
  "manageEntity": {
    "action": "Save",
    "entityId": "766611132",
    "entityType": "Track",
    "nonce": "0xe6835c26f43c96c13f0dde8cc0402d6a56eb4f2ac9ebd586c28366d94575d1cf",
    "signature": "0xa2e7663f78052fc4572a6b7917845235d9c75714f530c88d568e6b31f74240932160e827be08262dbde17b72f1131a7180839d1fbed359cba054b286a77558391b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}