{
  "manageEntity": {
    "action": "Update",
    "entityId": "753786222",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf36eb1c1807d3e858d2dda9fe30081092a7593887562d7d999be71696eaf2a7a",
    "signature": "0x16c3b1e29d7e0bfc4a1f8f889ca056b96818406ff01cff0d3df142e427650c9f4f2d806daf37a8aeed9478623d0a626ebd7152b35d2453b0a64006163ea2f63b1b",
    "signer": "0x5E2573da6AB2d9DE6F1896b40DAB3558B017D1E0",
    "userId": "753786222"
  }
}