{
  "manageEntity": {
    "action": "Save",
    "entityId": "121484",
    "entityType": "Track",
    "nonce": "0x22a76e2fbc808917706c699507209ee3940852b8b7999107c6b38f8e4c027ff2",
    "signature": "0x0d0dec297885c35bb8b615a64ebbd22aa812de784ab9f898bb7924f105959ccc6bc13407caa936662b1d5351f2c58a8e15c8a5949f8cab9955374ae942510a8d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}