{
  "manageEntity": {
    "action": "Save",
    "entityId": "649937365",
    "entityType": "Track",
    "nonce": "0x8d6957a62677238b2ba0372d7b3ba06a04c23283fdbeda7dd7ff6a5e6a17686d",
    "signature": "0xcf248b76652a3303d520c0b2d7f693f5943b13b85e0adcf8c5eb3b7b9a2957cc607d8e9bb3e9b90bb6b3237794bba88c4df12523feea09dbfff8915614a8f8131b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}