{
  "manageEntity": {
    "action": "Save",
    "entityId": "374498579",
    "entityType": "Track",
    "nonce": "0x80220df325b4cc482a1ce854f036dc43965d003c63235e181b80f9469dc8b55b",
    "signature": "0x812e06fff6574cb5ff14065c49b9bd7c794939d4ff14aafc7274c8323e147ddd3a9c285badf73b5fbb6594f9d2683dbbbec4918787516a0c2f90ff3a6e0c66781b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}