{
  "manageEntity": {
    "action": "Save",
    "entityId": "203389676",
    "entityType": "Track",
    "nonce": "0x1eb4feacfc967e61bd1057b605193173db38992dc12e7909b7ce2e1189e394cc",
    "signature": "0xb0e36aa6867abd06f979321383cd57980839e7b17334a64c59dfaa07d7c14e02120fbf15b611107f609824ba19cde300250e8612976cc5dd58f638d66aab913f1c",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}