{
  "manageEntity": {
    "action": "Save",
    "entityId": "777838078",
    "entityType": "Track",
    "nonce": "0xe59b89c5e69728172844b22585437bf4015e1d51705952781b1d2c46ee9e269f",
    "signature": "0x58eccf18ac006123b6d32233d3d81e5cf27517241990945eb548d5781a6eabb15d79a40a69a78f07cbaed463dd21e9b28ce5a4edf5d25050dcf49c4c5c3f84411c",
    "signer": "0x9f9d8A79e84513fb6Be975228cC7A58769C1358c",
    "userId": "687106194"
  }
}