{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892746773",
    "entityType": "Track",
    "nonce": "0x2c7448a6b43af69d1b6a52930e27c4eb048259893583d661fcfbd5dfc64ee2e2",
    "signature": "0xa56e5559b53057d6469e7d878e692da12c86da08d167918fda06691d6b92313d6e6c08c847f2bb153ef45669a0095c3955d1d83c7460e388ba9b61c4b10e45e51c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}