{
  "manageEntity": {
    "action": "Save",
    "entityId": "762753",
    "entityType": "Track",
    "nonce": "0x5993552d5c4268a491659fd4378e748a0db14c0539bc3ff33e42955e18f7a56a",
    "signature": "0xa402324feb4462c858e84e842875fd774685f47d1e3372b89bc2c7ab761b9413371095080f08b6905f272bbe0455a673c63510b49f08451b508ca1cfa2172c961b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}