{
  "manageEntity": {
    "action": "Update",
    "entityId": "674339889",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5553c13d32feca6b93170b5d7ec9d38c8f5f6c9259617a4d658ed10af2573423",
    "signature": "0x394b555cc9b71ca650425d8a8f812f8a858358e83ed8b3cf6f9b60b79150a1ed1102c24c9122ca03fa5a7c4100613ea8eaf13a895b730cc8419c333c1a59d25d1b",
    "signer": "0x8838cB510ADd37b71093e4FD76B81bdd280860f8",
    "userId": "674339889"
  }
}