{
  "manageEntity": {
    "action": "Update",
    "entityId": "331800435",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1251403a692976c07a5ed0029457640fff7528ff7059f0e7be4d4a9b1a0fbf41",
    "signature": "0x4b0e6525aabcf4db256409ab1412fe185a6ce7cacd3e6e8ea8adc248787631b9348e67405da823f78f4871a11e58c4d987e8824d33a5aaf4542087e1652f00181c",
    "signer": "0xE5440368BA70072e0f2F619C2f0451aAf6C2c0E5",
    "userId": "331800435"
  }
}