{
  "manageEntity": {
    "action": "Save",
    "entityId": "384325382",
    "entityType": "Track",
    "nonce": "0x0c51dd4a972aa58736eb750a08d3eba52b92cbe586630b5eaca4ca7401475cd0",
    "signature": "0x35ce36d15970b7a6ef49aaa15ba9fecfa4c4c88086e7f2bff859de3c13c899426fc05183a3023d68d858f2c5012338c39a09b954d8432daa5c7c37d6225ee9751c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}