{
  "manageEntity": {
    "action": "Save",
    "entityId": "105683130",
    "entityType": "Track",
    "nonce": "0xac89683660546a11e9e8411b5cb9c588ee4e0e7259f270613ea976a2b5bd9619",
    "signature": "0x21a5bdd93b5edd8a471f03814f4497ed1891058fa027c1ff9914edb1c7fb220502840be66620c4452cf1415df43f646e790fb7679853ba0d0f270d400bf648d91b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}