{
  "manageEntity": {
    "action": "Save",
    "entityId": "2102411293",
    "entityType": "Track",
    "nonce": "0x4ca901a4418885fa6d6edb9a4424906ea5aeda53923c062179884f575021a269",
    "signature": "0x228b27853fc09027406d0bdc803e25e151fe1a25c3133986f8b837ad7866d24b39468ea9b9755e077338073fde18334da047b10e3738b106d8696d1750c3d67d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}