{
  "manageEntity": {
    "action": "Update",
    "entityId": "303393509",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xfa3aebaaf61d23021363a2e545987dbd6a99bab65697448917abec9b3a607be0",
    "signature": "0x3700a9bdcc4780a7a4193dee120cb2ebf95c4186b7eba1d14c23644b792bdcd07c769d38f253e8c18c81cdec93d23a71533056c49900cd6be7583aaeceb0cf5f1c",
    "signer": "0x4E073b7076371ff6Bf848d0B4abA785B38B5ff1E",
    "userId": "303393509"
  }
}