{
  "manageEntity": {
    "action": "Update",
    "entityId": "502203440",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xde03031831a6bc8ef82a8d108b6b23db17b5be7a6d238a3d428ca32b470cd433",
    "signature": "0xc55f3ac82ea94dadc53f66ad8a71f2ec1c7d9726497073bb842484c0d12f431423821cd2f85176e1d1f5c4c60ecde038e4b0c5d8609e3a1ce334754421655e281b",
    "signer": "0x1945f8245174CF73ED3856cB80b9F9234421d1b8",
    "userId": "502203440"
  }
}