{
  "manageEntity": {
    "action": "Save",
    "entityId": "1935519377",
    "entityType": "Track",
    "nonce": "0x9962251ea188888288409b0ea9ca270b7556b2a12a7f9141a16a933bafaa68e5",
    "signature": "0x6506d4ffe48ef7e414f4164c08d2f71ccf2ecec5d915bfa52970ffbfbcf827a547500a5775016df886f0771069bc2e9e32e391a53b35aa98bb202fd718746ab21b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}