{
  "manageEntity": {
    "action": "Save",
    "entityId": "2099574158",
    "entityType": "Track",
    "nonce": "0x6790f68030120c59e5f2fa0166e909a4b5496f6035258ad499cd277118841eb4",
    "signature": "0x30db02eec3c0401da602df0f29355cce883e2c2d385a082d014d38c4851f4aef10a0f73965cd7caa5cbf071f7eb384e7c75841e8490d46db6dbba96129558dc71b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}