{
  "manageEntity": {
    "action": "Update",
    "entityId": "502583624",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierajm5kghc3va3qhxokfodklj42f2n2m7qn5hxtzv3qisvdbgkl2cba\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":790207744},{\"type\":\"playlist\",\"playlist_id\":1243923681}]}}}",
    "nonce": "0x2278b26bc5ee7f6d212baa12beebfe57998aaa013c02fcb99780127c1411a04f",
    "signature": "0xb0f68cdd9752282e138f3bf540758eb65697e6829b2a67e291a81a83d40b2c876806d6eae774cba2bd84bd04523e85b35c6052b7e7f2bce14a3ff082ae4aaa161b",
    "signer": "0xF87E352dfe47f2c9532a6F5127847cC6460A9958",
    "userId": "502583624"
  }
}