{
  "manageEntity": {
    "action": "Save",
    "entityId": "1620767540",
    "entityType": "Track",
    "nonce": "0x3b75a6972881a89a530771f84516108dbd26f9ec25636cf7419e500fde9421e4",
    "signature": "0x5f22449ab77782fe6900fc1cd078afc951fb851ed02b646020c6dd066a4bc34416354f664fdbf2986345c63087d0b93f4624d45324f9f83f482c652b341ac0bc1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}