{
  "manageEntity": {
    "action": "Save",
    "entityId": "1351976220",
    "entityType": "Track",
    "nonce": "0xa0455c0cad498be939a980d2c110ea64b3acf50a67b27b9a09e905d586108863",
    "signature": "0xe98e4ab73885e69d39d5e680fbc056d24b7dc6fc6b7bd5809885ca71ca46a5b547dfd9dc1b0f8910f01654633078c076e4dcde8be1f3bee6d12e4468237938ab1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}