{
  "manageEntity": {
    "action": "Save",
    "entityId": "1376451536",
    "entityType": "Track",
    "nonce": "0xbe3515b8efa9289055b44dd40665ad51121f32742f997d84596f7ec25016168f",
    "signature": "0xf95cd70ff832b35f7b6a20c3b8d171b27f43541672678c335be3b97d1cdf780a00106705d7a3fc8d362c609f84083bd4f15efd86e818c9215d8ac4ba370f8abd1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}