{
  "manageEntity": {
    "action": "Save",
    "entityId": "1393997001",
    "entityType": "Track",
    "nonce": "0x134def60afa05dbbbf08a0e47be47d68f0a27454de55c02bd0055b789f6bbd36",
    "signature": "0xa347a6e60a614b31eea41156d36235a2a07dfaf3adb773fe83ac74765d9b308e14941da8a61c2a31a3703d678ce896c40b8ae1106dd22875f239b230322557e81b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}