{
  "manageEntity": {
    "action": "Save",
    "entityId": "784049",
    "entityType": "Track",
    "nonce": "0x119af38613d231f6c80be8f0a589344b2322ec129b6906ac7f0b8c74d6e7c729",
    "signature": "0xa6fc7086d716952fb03fa256364f0bd625f65d012d07d3384bfd904aff0b1264093b1d9e0f929be89c90e009499a9a419e9f761dbaf8235f33c24cb00dc4fd6e1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}