{
  "manageEntity": {
    "action": "Update",
    "entityId": "660309543",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2e8432b62d0d7585c77f43784ac41ce898e45953af03c0d4cb069faf57236a3e",
    "signature": "0x7733885b60e2cd7eb863be23a27948b2b16b73274601ba43e9bde28db257c1510fe9ec3d6de98248a46fc92a790a92395ed0399fd7565af39de326928c7809e41b",
    "signer": "0xFfD85600B7cB8A3d0A8AEeB9840B7DC254a49D01",
    "userId": "660309543"
  }
}