{
  "manageEntity": {
    "action": "Save",
    "entityId": "1413212269",
    "entityType": "Track",
    "nonce": "0x3e92da31bc8cfd7c54ad1a3da4af9916ad17b0d5a093f9cea3defae912fd354e",
    "signature": "0x721fbf54542cd3cc7a40208ec501dea883df714967e7e9222a2a75dd4013461700bd7a6be89ff84fba3e8280a290ad7ee46cbfc748951181d3985b43717a990b1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}