{
  "manageEntity": {
    "action": "Save",
    "entityId": "61947",
    "entityType": "Track",
    "nonce": "0x83045f64ad8e80c63adecf4bcbefce329742149e3d86895f6d81e7d065863093",
    "signature": "0x46c4e12e603135c7c58e049ed5b1e425cfb2ccb463f0978fdd88505daf096aa63b0f2bd1ef439b53dd5fd2944fc60f331a375dee367666dcc4fa49d6fe32048f1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}