{
  "manageEntity": {
    "action": "Save",
    "entityId": "399229330",
    "entityType": "Track",
    "nonce": "0x2b25625ecddca77ea5f7bdbb4e978e550e4495c01409acf18d6d1c7e78ae3bc2",
    "signature": "0xea670e088d76ebcc8358d5783b6e84a6bfbb7027083b3121f9edd4449fc6cf0f6858e6f2fa44c2a2909aa82c01338794e1e202427dffa2114b7746258de733e71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}