{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044137756",
    "entityType": "Track",
    "nonce": "0x7f706dc68381fb3c083cf731026073e0bf9a51b9ff21a6fa747af8b7d34a156b",
    "signature": "0xf29bb5d49ea6712cca28701e9234155b45e810842590b7f8a891024552b9dda86609609b6910a028200c6ffac846f9112b01604b98e5e62b4c0a1ea93fac01b31c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}