{
  "manageEntity": {
    "action": "Update",
    "entityId": "554920508",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe5ee9a4c7472cfecc8efe133ab42f60858be79b0ec32f7431543a06b89944ece",
    "signature": "0x56585610c02829d4dddf79d0833d91cc1c737cb9d9b606f4642fc06b3f42789c0487f03ab2e7a20a144cc4f67fa1afd21eb3e62203cc0756b49db8a55148b8d41b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}