{
  "manageEntity": {
    "action": "Save",
    "entityId": "5152447",
    "entityType": "Track",
    "nonce": "0xc2360ff62afccad56e1442574add983a0021eaf24d929c8d0b82dd2e8651009a",
    "signature": "0x754b51422fdc6ad240c4fc03de93e923ff41a57dfa6377d5ffd63097eaf6457623e197248b384b2aeef31bdc57a4665e67ab46359035755bf0611970036419eb1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}