{
  "manageEntity": {
    "action": "Save",
    "entityId": "1147433131",
    "entityType": "Track",
    "nonce": "0x8ff7d690f64ad5691a66c43f60920e1c0f9262dfadda7aacc78383db02ffda20",
    "signature": "0xc6013d45709c14ee9163b36b0beb5099d7dd98925958e5ddf9accd8f5c2a580c67cb5b5000601c30e471b954cc5a05667c7afc888e85b4d172a9433e289af0311c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}