{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf2ac97253521ca674274e8ebc1e7a8ac24ed966cdf828088c2bc6964697ed6a1",
    "signature": "0x8e06f10d9b2dae319a594f62eed9ed14dfea40fedd155beea6978874bba7406c150999edeec563474bb05fc3d1c73b5b79fe1b357d19ebf82fb3a8311010a1c61b",
    "signer": "0x44a037CeBB5Af178C3809A13D0AfE2279AC14d81",
    "userId": "733102958"
  }
}