{
  "manageEntity": {
    "action": "Save",
    "entityId": "1564574652",
    "entityType": "Track",
    "nonce": "0xcbc3c7b21c795d8be0aa49d6b3ae0b2f00c9a65efd9ea303addcedd1a37fa0be",
    "signature": "0xa288c26616ecaef4037270e8628e978425e558ff468249b55a9a202d4faa7c0c18f69b243494eb36d4f9f767cc7bfc59e8ffd27bd279f8f0dcefe5fbcf4ca11e1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}