{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1ca1f8235de4fdd5fe65075530add8d37b9c3a4810879c3951441d119bf8e0bb",
    "signature": "0x137fcb2b78684ab5605110ef91a007a53aad897d54c943ce22b5faab77335a05385d123a40caf9140d52a969f88e30e34726e032124f2a51a9d190d65fcb38d01c",
    "signer": "0xe39E43e1936aD76A99D8b1178b95A0A7a7e6a183",
    "userId": "954675450"
  }
}