{
  "manageEntity": {
    "action": "Update",
    "entityId": "721987098",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8007f56230f0bedcc71c18ddee250a729f86797da9a187e06800e0de54f7ea9e",
    "signature": "0x9fbeba1a5c17b4aa29d1a97864959b3512dfa0c5949e16749d92d09fe2164041050dd9b04d368858507625b073d21d73d5e667fca89f487f53874d9c5afef3891b",
    "signer": "0x4c2B6D597D288449d9F215489E66f1cCe1c85B8F",
    "userId": "721987098"
  }
}