{
  "manageEntity": {
    "action": "Save",
    "entityId": "1674100361",
    "entityType": "Track",
    "nonce": "0xec892bc3cf8e9d38313ec8786e614b0f3ba33526296147fa8c457e97c35459a3",
    "signature": "0x69220a2daf2883fd7338f10e676308b53a25f98f202980188834353640ccf4aa620e104b78b8b1034c7f6d9b6648f81ee4b9babc0967cdd880539e769244f9641c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}