{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1d096b9b196e4656c2948dea15ecb4c04b562ed75232ddf8dc6a4131ee9064cc",
    "signature": "0x8b951adbdd23d6c9d25c3d6c486bb0036f9f5cbfa873e6c843a44d5120f4f0515a850253f66a2b90f80f8da0fda95a6e0fb6d9bec74156e91b4e2a22edf3cae41c",
    "signer": "0x93716e020f1e376Be9ec4fF785F3ad50ad2eF68d",
    "userId": "463531545"
  }
}