{
  "manageEntity": {
    "action": "Save",
    "entityId": "1812012811",
    "entityType": "Track",
    "nonce": "0xdc4beb2b1385b572ab04a18c02bec2d0d050c4a06b57b90e8e66e531b88403f2",
    "signature": "0xc07411417ee53e8d004145aa499351aebad173f7a5f51c71bd216cdf855ff36f32acd9fe1f955bdcdf4711e8d6dc3a03e1819a02a4cae2efa02363f40d9ca6481c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}