{
  "manageEntity": {
    "action": "Update",
    "entityId": "579560512",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xef78cdd04b5a36cecdb2c23de12da4a65a93e54d884b924adef79baa5388305b",
    "signature": "0xa7ee73587d3363598130a0c1640c221cce7747cf41300d2c2641e4b03aecf5162170869462e6c6903b326b35edf5a2a182c7f7a07a426c99585818473d553ec61c",
    "signer": "0x8619c1F590138c5D38f213Ce2D9589925968bAF4",
    "userId": "579560512"
  }
}