{
  "manageEntity": {
    "action": "Save",
    "entityId": "2013870053",
    "entityType": "Track",
    "nonce": "0x5541a5ee2246e6d626b550f37700ee98b583460ba370add86066d2dc56930ab3",
    "signature": "0xaeef504d5881deccd542c2826cb0598c0054d625b677e4b9e6dfa367f493a7c63e313a118cefc62b0fe6defb3ad39e4fca207e7a2480f8a166f184993b26e1c11c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}