{
  "manageEntity": {
    "action": "Update",
    "entityId": "375546979",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierahuhwuits4t3c3xuud5mc63hl7s3rdxrrmttilwivqn2fsajycaqq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":487744262}]}}}",
    "nonce": "0x0463fcd0d89828b3653506fc0b889b0bfe7c3fbd0e54dec0bf52adf273439e2a",
    "signature": "0x2b45196cedea0fde2ede62328d5c1a1fe894892fc7fd81777784e892fd109df23fe25e624a2d66340ad1236a89020b5d97dbd1b533b80b0639f8827e3e6ceabf1c",
    "signer": "0x836816C738a1b5c5e31039b3A351DbB946361a7F",
    "userId": "375546979"
  }
}