{
  "manageEntity": {
    "action": "Save",
    "entityId": "798474905",
    "entityType": "Track",
    "nonce": "0xd9cc44cad098658662d3ea3dea71184ef4c49b7f6ac55e9c8f3807c3515eb921",
    "signature": "0x99a6a45c2a127dd242b0e600d350aaad99e752b7bafb433eb0061c8188e858bb66d3d76e5f05c6b08b93593cfbcc4e4ea6c4477600f0f3c20f003404c18e168a1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}