{
  "manageEntity": {
    "action": "Save",
    "entityId": "1371960623",
    "entityType": "Track",
    "nonce": "0xf25ea7d3b107d1aafbc36de2c35430f3a2bd6f4ec653bb7eb3d3d5d891cee097",
    "signature": "0xb089c6b53a9dedd2372519e416daac69ace79a58048c37029fc1d18649d9489b058f54f44530cb3440a4ebf0d6b75c2cef52e1546d11a49d1bb7311b16d1ef931c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}