{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9297cbe66cb85e40664111b55d219f5e56f62810c0796118e2d53375590c109f",
    "signature": "0x4ee96df50c1e968ef7dd02715dc3d393b09ea3b8fe40c4840bef596d1993402d5e32d3c05e1dfccdc4794cdba68103cd88f8f42d1d8a4906de570c103f170bc31c",
    "signer": "0x3c7e0391F68f4dbd2Ab29eD5CE34A790a03Ef213",
    "userId": "608859812"
  }
}