{
  "manageEntity": {
    "action": "Save",
    "entityId": "63334351",
    "entityType": "Track",
    "nonce": "0xb15d840b2306a9a4ae1ca13737cf7484b4b86616d3e827f444276201686e3f2b",
    "signature": "0xbcbe861012b4738c85afefcc601b57a7f4d032e246a2dd849f255ad14f914426137fe8aeb985aa3d9e09ec7634644151959676aa251aa905144bbd9ed9a60a5a1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}