{
  "manageEntity": {
    "action": "Save",
    "entityId": "1945132480",
    "entityType": "Track",
    "nonce": "0xd5bc5d145da04d9ecc41d962b7a1b080691e4c3930b7607183c21938e4f48014",
    "signature": "0x17020bc73cd02a81ab053c486e7dd0b56d90a2be9644b050553f5d9d3bff76fa03822e3b5c212a4152869be19aecaa34a9fc4dff638130b1f11b9e29d0c0b2541b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}