{
  "manageEntity": {
    "action": "Update",
    "entityId": "502388335",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraugjmtdi3x5yozj6gemkrziml75mkhdasd4ta476pp7uwkirowhca\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":697645129}]}}}",
    "nonce": "0x5efd4f4358fe34c6f6fcbae48225bc8690141b13e11018648b9e495849272b64",
    "signature": "0x5ed8add92407135b60a3616c9de01709de6e6edb4e8602d15c28e24c8cacb62154bf335e774b08d762a76a20487ee597a891cb7d4c9ca8f361db8aac6dd0c32d1c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}