{
  "manageEntity": {
    "action": "Save",
    "entityId": "739820800",
    "entityType": "Track",
    "nonce": "0x53420eed323c10bd1762d2e3630902bccda9c45e81d9dd6ca1767cf07de5a5b1",
    "signature": "0xbecba4766651bdd89d8a909593919eef1258317037ab127900e8556fdd40d2ea7f3ab4574537b6f4f3fb1d51e11f84f49ed3dde5bd62f8fc3566006c13cf05931c",
    "signer": "0x37C656432bDD87630C13F60036e9857B5ee36154",
    "userId": "288167767"
  }
}