{
  "manageEntity": {
    "action": "Save",
    "entityId": "1226503254",
    "entityType": "Track",
    "nonce": "0x94607afdf0a00960a090223c811da66e487c492b5d7478c243ad4be51183f461",
    "signature": "0xdf4ba649689dedd74d6c5b1be46131194887445cbe250571cb1eb0296261af2e2f94f485913f18b5e2ae20aed10cdda18af46c96ff583b3293f9d4fca68597081b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}