{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x92b6c589ab4ccbefc53cb5041dfe0d1666ddfa429a28714d9fdb0dbefc41d25e",
    "signature": "0x5977d374f8b04f2dd2dd92eccc4a0553a3d421cd6a7c9188701461b2729f77516bf42330d72af43667649def0753781a97832f5c49749f149f508c7fecdd3e141c",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}