{
  "manageEntity": {
    "action": "Save",
    "entityId": "1558101421",
    "entityType": "Track",
    "nonce": "0xd19e1d909895524819ba392a83f8f9e2cc16f074ba8960e3113ffb03bca236d4",
    "signature": "0x2e436cd7eac332226ba564c54323c198f3043f1f92ac69c764f051534591993d656b6881dcf5591560cc11b57f68a31a4610b60a4ab43ce5f08142c03148f1a01b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}