{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x21839cbc222faa0e3cee07d9a85ae1236b789891ff97e406c49b53f80cfa6de9",
    "signature": "0x61d05187b1002acf15285a6750716ea1b042e368486c1b6d36b9d4480d8a697227ed63bb804ae5e1c28a4896025c53b2eefd1c7f31469ae5d0f9927f2009573c1c",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}