{
  "manageEntity": {
    "action": "Update",
    "entityId": "870901302",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierahhtflfftcshdcyg3wyn6a7oqrrm3qqgm42voy2xtatn3jlq4omua\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":854167915}]}}}",
    "nonce": "0x1f9be731f2deb5807719d64bc42f2cdd6b5bdf905f24ffd4164f6286434f8a38",
    "signature": "0x787c65ac9eed7c0417e8bea3ad78cba12674ca0b40f9e0c911641b552246099776e73d87bafe02195a708a331e22eac7951d9231ffffccb8a3c9f4eddd6286af1c",
    "signer": "0x537FeA657eFcF11815a94831D95e49f18F0250FB",
    "userId": "870901302"
  }
}