{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962674768",
    "entityType": "Track",
    "nonce": "0x3491beaf3fdf3978404bae5960112a093b7d2d66dff90b5529329a9af20874cf",
    "signature": "0x3dc0fbad0b705f3ca016b0503ca04f8a0b44440836360cbe79c017e4b05f1279006bf9ce3832700133f33ce2485037e21ef57329d141f0a370834fe3a4995dd01b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}