{
  "manageEntity": {
    "action": "Save",
    "entityId": "122946508",
    "entityType": "Track",
    "nonce": "0x23459fbcdb48cc5983625004219c1da5c26ca7e9fa73b8967414b3824a90b872",
    "signature": "0xe0ab652348ae0ef2e7b4dffe97d8d22cb2bdb3f82774df8df761b903de713426302d9c180da18d783a4b196e9daf8a2f1ef0cc49669184e5763ae006b4f0da871b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}