{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x34d863f5e50c40b0407a00bbe03bd9691854994223c51f885e9a1ba91ee83dcd",
    "signature": "0x52702f0ba82f57715d1e23eca3832ed3f6009e651137649852e81d18be1fedf934a65f217884f5f1c532a53d84eb4d4b6db03772540aba3b45e95d8f117cd8441c",
    "signer": "0x6a4B54Cd08C134CE1eB2e1508bFC7D100e2Bf6A2",
    "userId": "70502085"
  }
}