{
  "manageEntity": {
    "action": "Save",
    "entityId": "1459474987",
    "entityType": "Track",
    "nonce": "0xfaf4c366cd9b4b595ade35884eeb2ef0fa06918313438fae7ffb4648eb4f4d9a",
    "signature": "0x433176098c683384a26e57467160e44505a55d1cc78a0e37777d98c7581fea5a73ebd13f188a16be954207c22133b5e211842d37fb08ab3b7e954ae5d019fad91c",
    "signer": "0x7D273271690538cF855E5b3002A0dD8c154bB060",
    "userId": "1"
  }
}