{
  "manageEntity": {
    "action": "Update",
    "entityId": "754769888",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x07d137a00561a198a6d7421232955a7e0d87c87b9eafa1bab9d8bc9291285ec0",
    "signature": "0x903ef5ec1a89be2c533dc5c78ded05b6fe1ebbdd2c198a24d183240297fbd0cd1986fbc4bad108bacc467814618a99f9bb96c9aa99854d6054168a3f8ec3b5741c",
    "signer": "0xBD9646b3F709697468041872EEB6d53c3EDaccfC",
    "userId": "754769888"
  }
}