{
  "manageEntity": {
    "action": "Update",
    "entityId": "151304001",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe043ff8507b64e1e83ba2f6ec838ce6a70943b981998b4852e815167fe519435",
    "signature": "0x0c13c39f8d6d1030760f75ede986007f4583e6031497405ac2c73d853d8ec37f1907e66f6aad9d16f85bdf3a8173611819cb3ec6bcc77f779943a61a7dc2afaf1c",
    "signer": "0xC8411f2e29585536b0CB63E6163522b1074e2f7e",
    "userId": "151304001"
  }
}