{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662563123",
    "entityType": "Track",
    "nonce": "0xeeead6bb311c72576e62266f5a468d67df695b6e18a17d014456bfbc35b5b00a",
    "signature": "0x0204c9e7ecdd42009bd86aae805f4f79b5ceecc8aaddfe7092f147dc90128646332c6215c30ba388206f318110d6c53a4b5b8ae8ab4e34654e270aa12f7a50321c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}