{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x15e2f52a766f7f73efc6d4a26566d24f39524a37ecdb5ac4782f187ff85e73d7",
    "signature": "0x3c4a45ecd6bcb190a4e8c30dc9ebe2b04716a079890c9b3d4b62314d8ec114b57a5cb20a12ebb055d66bf705c36483af9ce5f91e8e5b9ffbea3691cdbc403d591c",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}