{
  "manageEntity": {
    "action": "Save",
    "entityId": "1189963004",
    "entityType": "Track",
    "nonce": "0xc633af1ef3506b3dd305aada88fc43f9d0c0e288851435d569919b4cd2979709",
    "signature": "0x7e6b9286dd0a6e9e575fc282b6ca02d14b61afff2be0f47e0f01fadbd5e439963ab975ec050166ed4b1ea29f9019068f611cd1bdd9f18f000798cd9ad66a8ce01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}