{
  "manageEntity": {
    "action": "Update",
    "entityId": "257889927",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierawtr7g2imv47ahfnfkaruqxijojkztvx6324hksoc3kaa5m2di2eq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":215543310}]}}}",
    "nonce": "0x08deef61d7825a05d52df58148044cdfe5542362bcc5cc8969eb3853935776b4",
    "signature": "0xf0b3f55b469bfa87ae0dcd0412c622088ed4fc20ce65a7e358739ad0b7216c1e479ddaaf46fbf2706e75e88087f9807b86f5dbe115114ce2be007416c127251e1c",
    "signer": "0x41Ecb4Bfccb3E652E747378FB31d32e9Bcc7dB5d",
    "userId": "257889927"
  }
}