{
  "manageEntity": {
    "action": "Update",
    "entityId": "272809645",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraifbpxj2swnyil3ofvjazunoh3qnckngpw42ratz5uzjjxvvxt2qq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":50301}]}}}",
    "nonce": "0xd7d0b0dccaecff0ca39a738ee6da50d769ca20256c8d3adae0d0056cd229c0a2",
    "signature": "0xb862d0c9369604a028b4db6e4986a61ae3c970df6f257cec17203e03bc51fa12471f595767a97c35b0df574c3a0482056a0931ffa3985dd4f50c1e2eaad2224c1c",
    "signer": "0x519f59B3efef0Df45928E79086d979C0C4A40Fee",
    "userId": "272809645"
  }
}