{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0674e602b51130f66b5156e333f8985af57660e1eb896f61ef9c9b2a38492c74",
    "signature": "0x8c43c0abc632287c22075c16be82dca7b0ae302a73056d3d2860ec4faf0a1eb57705772251386a02fe2f91c1da5639727ceae2db99fbe227c5e7c33668442d971c",
    "signer": "0xdCEd2038393702F47EfF3e1fAc5D5Ffb9abfE03b",
    "userId": "883672014"
  }
}