{
  "manageEntity": {
    "action": "Update",
    "entityId": "90409901",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierapo3pcfgmme6aufqr252ba22m2agaush35t773ueaa63xzhnchh6a\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":748406786}]}}}",
    "nonce": "0x47fe170ecc864544fd4fb75e8050ccbee7c9f3c5844f4860c7e57024744cea62",
    "signature": "0xdbb7783a3cc2afcf9a69488ab4f406a9fed1d4dd3d2f922ad093f2c8ce4d5a1c5149b39aa0a1dddfaae6625059e487df81155d3305fb7f4c2d8cb8d9e58eab361c",
    "signer": "0x50e9A2386bB7f56C2c2E6472468614D1da69c3fc",
    "userId": "90409901"
  }
}