{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508116473",
    "entityType": "Track",
    "nonce": "0xe0f1823a313627e7c374851a6b11dbae1566e2414565b78a053946728bca3af5",
    "signature": "0x1abb37344a2a7f60e3fa53981cb1d8adcc5d749ad6de056a546ba2b0cc11043b3c87bb33c3881149026bb2a740c84f2f10514fc13828e96a262f1fc4ebb293e31c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}