{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635452735",
    "entityType": "Track",
    "nonce": "0xfeb617b70b1eba566b63240e877fa42cc2998ecbbb9d287bf4d22bc9f9a765e3",
    "signature": "0x21216984771c84311101f6dff2095df324b6d22d330043ae02dff529cadb6b89603223563412d44d4bdfada1524364de574b339f11de46aa8900c2452f0b40231b",
    "signer": "0x0D118a31B964e68f3E82481bC1aeb97846819006",
    "userId": "219206868"
  }
}