{
  "manageEntity": {
    "action": "Save",
    "entityId": "561868894",
    "entityType": "Track",
    "nonce": "0xaa1d437efd46e04d65e4c041974c6ccb19fc8ab83fa46ecc7c8fc26ef99ae0c9",
    "signature": "0xa371604489ec9ef957ea29e7f2ac0e61dd38ce069285fa529c46de0dcbab1e365b90375cfaf990e0619b8dfbe8ec51776624fc93ff83218c78d20f7bad9190631b",
    "signer": "0xcF1BC458908F84936B19Ca8Cf67C751CD647B02b",
    "userId": "310796"
  }
}