{
  "manageEntity": {
    "action": "Save",
    "entityId": "586240837",
    "entityType": "Track",
    "nonce": "0x059dd042035e59a48ff2bc958770944680f1c5179c9e45399e87396e71bb3e6a",
    "signature": "0xe01b50cacddd4f579fbdac728452b70dd0c42328e4ee685b226eee137c24bd405ee3f51692089c0523b2eacb6f68834b6f9af3fb779795f093a4edd4fe2025011c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}