{
  "manageEntity": {
    "action": "Save",
    "entityId": "399789737",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3bfed23c938e23690d611d586809710049e103524989e35e420b90d8dcd72204",
    "signature": "0xa85adf5be4a58ffb2c4c6f12897c786b0bb818b29de49f25c39e426fc46952e37fb9c40ca28117eb817f0cac02bd5048f66769d958b74f428d4494cf3aaf7bc91b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}