{
  "manageEntity": {
    "action": "Save",
    "entityId": "623881999",
    "entityType": "Track",
    "nonce": "0xdede7793ed29d76c4745912d55f508502088d45c22e64393efaee7604b6386b6",
    "signature": "0x1ebc4e2cbc297b94d2f8d0a50fe0ec9020934422530f2000d8df8f09abe26f93624ee7976e267bca42a958e9fdfb5623c9ee744ced3094b756f367dcda6c5c761c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}