{
  "manageEntity": {
    "action": "Update",
    "entityId": "819390431",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierah6aodrw3kjmuc535nxfeiw6re55fdrnsrp2nxt4wrodj36iav3ca\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":369143172}]}}}",
    "nonce": "0x66a003f05e3732671464bfae234375d82cb85b4544edc23f10c7c47a5a302e00",
    "signature": "0x128d3e70ec5cb128f31c30daf1ab0607e0ae02b4e01d64c897a50e52e148b0ad34afbb76b17c470b7f80bf302364b74f80457314f39b44ed4ae2c24c0556e1ce1c",
    "signer": "0x77AfB3bbF8b185bA09F314dE4a0D619f5d0ec99B",
    "userId": "819390431"
  }
}