{
  "manageEntity": {
    "action": "Update",
    "entityId": "383993807",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x53a0e729baa5f3eb81f9e14b820a55ba81267ed230992b03a7f31cf67f236620",
    "signature": "0x68c57890877cd238f796fb3d27b73ed71a2593a314f5c31714671e1384c3f1c95a3a0ea3b2ef64ba8a9f41d379f82b872c0504e152da1610772a990c27a92fd61c",
    "signer": "0x28348578D94c03b9B8E5F1d6D2668867ad2d55cD",
    "userId": "383993807"
  }
}