{
  "manageEntity": {
    "action": "Save",
    "entityId": "165937860",
    "entityType": "Track",
    "nonce": "0x5e828c463fc117cef38de9a8c532ffffd94cd67be82c8a312642babb5315be23",
    "signature": "0x3e2b858ef539acd0a6c07b3a256f143e29733a13dac2fa40e185823f8394e9aa65e3a8eba493e69453dbce89b4fdc232829e5772f884b2a3360db4e8c0dc97501c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}