{
  "manageEntity": {
    "action": "Save",
    "entityId": "755023254",
    "entityType": "Track",
    "nonce": "0xb3f6566d78fcd3fe75786994e7b53e4be35394b44679a52afe5352395acf000c",
    "signature": "0xfaf8c47904a6b997aa544100cf86d0c9dea5fd451f3b56deaf70649bc994bb865b38ace155c3fd61f60c27ba1f79ec82ec09abb7d6746d22a6bc98705b22eddf1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}