{
  "manageEntity": {
    "action": "Save",
    "entityId": "1789492995",
    "entityType": "Track",
    "nonce": "0x9f9796f1e5f790307bc5200aad63edfd09eef4b8ca742d87b5e24eaad500db63",
    "signature": "0x19cb5f935c1d211de5aa3b9895d50ca4cc6e7e8bc39ae74da2ae1948e05bbcd40af03ebedc2cc6aa234418b829c045ec1167e918c732a9e655b43e10f9dcbe061b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}