{
  "manageEntity": {
    "action": "Save",
    "entityId": "751849",
    "entityType": "Track",
    "nonce": "0x1e6d2199e454aec428992566d0d34fa46f76386417fd563b3c5228527d5a701b",
    "signature": "0x9eea758e520e58d1e596fb718a3008216f1854afe625b44e6ba91a3810fef8f02b840fbaaaa1bad85e9c0999b31ee19b6e855dcb5a00ad31359c37606858cc461b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}