{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4a606a2d1d9983a005a6922d68e146fede40cb0c3d0b091255d169d9391ff3d8",
    "signature": "0x7ee27552211edeec90c09648ca019a568ad97eff6d6f885d80e557b70724648955938bd684452e30460890a51a9e004ded54d55aee5fbf8abf8babc58ca3e5291b",
    "signer": "0x2f3451179beA9A3C62532F5C9D20609cDf14C4Ee",
    "userId": "210120811"
  }
}