{
  "manageEntity": {
    "action": "Save",
    "entityId": "522160624",
    "entityType": "Track",
    "nonce": "0xa19fe1d24981b947987009f5d9fd314c7a2e10e90b5065ef2881fc6def166e02",
    "signature": "0xa859e6808f03a0dabcb67eabed4f7ffe3e71bb137d43647cce5b6a480bac4e46465a898489d6b66855bbd89f82c653910de74a192913c76e37f0de5227cc5b4a1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}