{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x87fd5f9f238d6a1e5f2a156d825cc5413bfa65dade7145e11925502a18da0016",
    "signature": "0xeeb3a797bf16f8c464150546590e6275b1361e05faaa4d013f5ad49249e005147a24b7b2386b6bd40542d4de79b6d399e7680b270671651813d5b882bea927671b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}