{
  "manageEntity": {
    "action": "Update",
    "entityId": "921301450",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xce0309fe82f9d35bc1ed0c0b38f6edafba88560fcd5291192218380bb70c162c",
    "signature": "0xa0c687511b107cb10b2ff10e8d950a07ec16bbcb97407e04ae296ba94634a67256317a21c57f01a24ba17b45d9ead5f47f49c9b916afc3522e9664e5f0f8fb101c",
    "signer": "0x90d9868655F9dBcd7a252f0F204AE27Ecc8aad9B",
    "userId": "921301450"
  }
}