{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x49d889b636690a4dd5d323d37fc9f334ac0154c9e6e10fbb6f6a152da1df9826",
    "signature": "0x911b4233364fbcb7930c6cb28a9fe2dcccc43cba2162bfe0d0023ed27dc11b2c2137291d13dfd8eea8bef146d174cccb5337a4e02b55ff4e44285d77ff6df0fd1b",
    "signer": "0x2De475Bf604136d752575F3b37d24dc094663D3E",
    "userId": "259985510"
  }
}