{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7b4de13401ab4525a1e2c05355da5f4c38683e97070641d0f1d029da1a57bc95",
    "signature": "0xfc94aefcd8b9518c749022de48af98b0ec14725a187ca35f47a99049c06e31af2257a2d587159e0d5a74f82c70c8444da7dfaef97ea4f5d0a232bc7c00d132351b",
    "signer": "0x045f3ff2A6ac0332f4f6288E35B9d3d1Ae169354",
    "userId": "704529763"
  }
}