{
  "manageEntity": {
    "action": "Update",
    "entityId": "554920508",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x42ebfa2ec89f64164d10c1e56f09689a3cc5781fc364b77b319301482760635c",
    "signature": "0x17acc0255a27f732db3c941afd711a27f6859727833bedbd32f3284d4a4019f15a2db520dd4571d750a06e26c6476838eb3924b8c1498eece4c940933fe3a00b1b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}