{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831655445",
    "entityType": "Track",
    "nonce": "0x11638cf90b6003f2479439cf29fdcd409307a13d1c54db141ddf42799077f96e",
    "signature": "0xf890b7efa36e9bdba4a4dfbebf872412b3c62955b12d8d0343365c27163b1e171052318d37b267763ef9332ae08f6714f3a8677db0d5f3168bfcabcbc52110b61b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}