{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x934f079b54a7c9919640486933a30221eaff82a5fb0ddf07c3d374f778254228",
    "signature": "0x30f7948006e2dd3428748add3bebb6112b95b7145a6657262032d7b2887cda202eddf7b9ee71467fc14b7909f994514485a6e4fb61e4ac671ae4464dde1cd7461b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}