{
  "manageEntity": {
    "action": "Save",
    "entityId": "445542978",
    "entityType": "Track",
    "nonce": "0xe9e0427f66441bedb1c44bcd09b07037e44825059da0a6c1d58e3fc61f454d0f",
    "signature": "0x62fe130c89bacd264afbaba212df98774c1cc5e709c8064105589a45883bcd3e32b46276a12243fdbffb5208f023402c5d6e40a31e8dedab8eceb2cc56c7a7cd1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}