{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9ed4d0c6bcccfc8b61ac926abea1de182786b63c1a40e7324ce95b6e366c22bb",
    "signature": "0x0642d56021578243471b707346badd15c391b37859700c677e34da7030cff9a63a7ed572008007806f67fa6a9e23d27024fecc39bd2116f263d4264efddb4a151c",
    "signer": "0x7d1836Bbf040222af3fFb18D74acFE9485241C1d",
    "userId": "912728982"
  }
}