{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ca200b9c04292dc9639ed5235a51c61f555623059afa85fe507f854b1f60c7a",
    "signature": "0xaf8687eefd13dfa9f19fa1a3c4d955ba0cb03941e0db9c42f4ede29d1d39fceb26eb3d08187983bd299082607de6b637269f73c037204aeceb2dbb976a9e90ff1b",
    "signer": "0xbb3b8C270080b0DAE42411345FCDc6a00369e247",
    "userId": "690093689"
  }
}