{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x446b8dc43bcaef7be49680e168a0d9dcbd7ed30caf5425b09f0d498ae5d7adca",
    "signature": "0xc28625ac01e0d4f7325d60b12334beb8f2987edd3e2f88912b04a418af76242c11bf015db9b928b1d043b5a056e91a0a6032e91ac21b27052ab3aae74243caf11c",
    "signer": "0x9d5d1f1a59bB255396F7F1e7DeB307A4F66f15ec",
    "userId": "429311703"
  }
}