{
  "manageEntity": {
    "action": "Save",
    "entityId": "366212943",
    "entityType": "Track",
    "nonce": "0x7ec1c6ecf526c5fb872fa369f7be6194a9daa1563e1707d85e6551f16a231b72",
    "signature": "0x1db9d96fa27716c2d9985d0011075b188b07deb9aa526d59a0576f2e3faa975e7147eb31b4eddeecc7b188da47bf14c39f371d874075c3468080cf305305154a1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}