{
  "manageEntity": {
    "action": "Update",
    "entityId": "505271212",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x148cdb3cca8e6088fa0ce0fa5dc8bdd0c272e74ad37a88c9785b32464f2f62f2",
    "signature": "0x9b70b4f84080d11245b5b990ca359fc0f973b57e28df8638bda45a81b2ce836c1a84ffd6777b251fa5679bde46b5f7ea9bb4613dd32db7549bc77a8596557ecd1b",
    "signer": "0x90336978123880996d16F1b2ECF206DFf96D3e72",
    "userId": "505271212"
  }
}