{
  "manageEntity": {
    "action": "Save",
    "entityId": "1133395718",
    "entityType": "Track",
    "nonce": "0x0f590967819162c1e078bb517df6c674572e4e0d80bb384766c2474802af75c3",
    "signature": "0xc49714d2689e2aff4cb7d60bf0caa98ed5ced8a4a520e285f7c55625d8c56fae73945042f8aa0ed192e1812c4976c7571b5373de8bdf3922fa78621ebaf347401c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}