{
  "manageEntity": {
    "action": "Save",
    "entityId": "876811609",
    "entityType": "Track",
    "nonce": "0xc4d8df3a3050c624e948abf3c44a79d716d67c7bae64ed0cfe0cc1f27e81a0b4",
    "signature": "0x85a0cf25015d64a4b462269e57250c1c229ec300cae9f424fc7ed5ee0ccf34fc56f55537911982b128f166f1dbb03626f48337dd021913902967ab3cae53ffae1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}