{
  "manageEntity": {
    "action": "Save",
    "entityId": "752228046",
    "entityType": "Track",
    "nonce": "0x2278019aeb65fdfb72d2f0b5cd09a49aba9644a7dd294d9d6c2b69f630cb2c5f",
    "signature": "0x20a5407ac301db86d8fa587ab1e06d2d3db5949837e2a4c5e6f828f1ae3cfc9028e85387f3f398343d57bd417917179f2f96b55fa0c036950d7a18550727d0111b",
    "signer": "0x225af4E1A90C3aC851989a9F637f13bBDBeF3fa8",
    "userId": "17598773"
  }
}