{
  "manageEntity": {
    "action": "Save",
    "entityId": "1872858024",
    "entityType": "Track",
    "nonce": "0x41c06bc8d0a1b5ee5444de96c258af991937de773d87f02ee23217c5b6eaedf2",
    "signature": "0xfe6f4b46baa7809bf147b05274e8d5b2f413e71a39319a071ac54665ba3fb3fc5b2a58b88e0d0d62131401e4189885ca83a74436085947ad110b268f22c285941b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}