{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x673421064e4694a479fba16c3a6304e6b4c12fe62d60a143fa662fc3b7285930",
    "signature": "0xf641e139a1c683724b88502a4f6c1f26b0cd1972b580f88a71b2e2ef48a114843736c59a93e976610d96582b1a53a697f40be31f7b8ef3e2fa106040aec60b791b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}