{
  "manageEntity": {
    "action": "Save",
    "entityId": "375767636",
    "entityType": "Track",
    "nonce": "0x7c5cd686928a89bbc0a564506486604cd03b700cfc116a3abcb3c109ae1156fe",
    "signature": "0x6772530fc968e4585ecff5d3cb081f21231fd833063b820de09549dbab57c06b4c6bbd7c41f0818e12475322fff3775c1f6bb2930fa63240253db30eece95d291b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}