{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230354333",
    "entityType": "Track",
    "nonce": "0xa81f2ae8c0a00f5c4fef6216e602d11a1665762d0c459f1e78a7085e52ec407f",
    "signature": "0x94aa17e011ac9e2b6db00814c18b9673a43fc430a2b72cf8dcace8dc945d3df6024acce04975231974f9a3a3a0f33d71e4e427f4163462e66cd00dff3e115df71c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}