{
  "manageEntity": {
    "action": "Save",
    "entityId": "543728374",
    "entityType": "Track",
    "nonce": "0x0800dc6de401802294952ecb841e1ad0544dc0e44a52f560578abd5b6d4725cd",
    "signature": "0x486f9d1c38336d4ea9fe222db98516754abbdfa7728122e12d113bfa31c5bdb35d95273ea3d6dc7185729840e3a21bb2e9152b208dc9336fca867803b2ce43941b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}