{
  "manageEntity": {
    "action": "Save",
    "entityId": "2095843201",
    "entityType": "Track",
    "nonce": "0x4229a8b78e505e42cfaf3d262801e8faa5a8cf46187e169b604ee4790cbacff5",
    "signature": "0x07981cdd872466c8953c4abf53bc07160b791ff70b87348ed28fa1ab02fe1fcf5178d532749f99e5f0b090331719d2c11c306f8c027090fc8bea712693ee283c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}