{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x21c20eb2057400679ab7d7b89d95273cd246fb8db1e83cbb67460e6fdb5ba3d5",
    "signature": "0xcee0a8e51b056914c18872e11435962d2159aa202e2c80166d9b849aa4d9933f09bfeafe79f4d0f219321031747ef97a89d72f2cc9db99118d00b3d0016e2abd1b",
    "signer": "0xD144Fe61E486319F0aed3A158008ec094C04Fc49",
    "userId": "298221337"
  }
}