{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2153e0d9eedefa497fd6c99eb6bf1b3d861843e756d26c7acbf8b5004c2ce292",
    "signature": "0xa21753741b6741edd4ab8ef9c832d5cb701af8e23cd6ce2297f2e56b2c2bd725578f3ecf4ff4cc20b7b51185d571e3f073c887193443d993d0001d5acad46a2d1b",
    "signer": "0xbaebE65730fFfeDa12805BAcB73a64F73326DF77",
    "userId": "276255704"
  }
}