{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x49b27be19635561d0c8e676fae530cce9b265500b0fcb2d116883e359d99fa38",
    "signature": "0x16de0e86694bd60f43000f98b54fb5cad3a9ec92f21f7a55406bf84013515ad622befd4e9689d756b484838bd30357205c02fa67f915eff21da9dbead0e3951a1b",
    "signer": "0x530FAbE17DCf39F21fF28C09C454943CE483816D",
    "userId": "140097"
  }
}