{
  "manageEntity": {
    "action": "Update",
    "entityId": "478491171",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierauq73qteiqw4vbvijvjyyg6nan4bytamz5yfgjxug6d6zhqy43k5a\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1981158286}]}}}",
    "nonce": "0xcff9520e339e3f86b323ada647fefbe05d9c46b6e6160fb23ecb6ddc61e5c2ff",
    "signature": "0x67c596e07a34b8069eb7e0e3c66f4306749251645e999b485f97fce9dd52fd357eb55d9287261e510996ff6ffdcd11cc10d4f7872c5e33bb563c23e155d487441b",
    "signer": "0xDeBB0409dA324f94c21071bA9D4D97d95a02ED62",
    "userId": "478491171"
  }
}