{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285257940",
    "entityType": "Track",
    "nonce": "0xdc28c41b9473c371e1aed03f51706f9769e3d9e77ba5482a9cd8e33772f9b4b6",
    "signature": "0x3ac44fbf274a4b81b44192ac2dffc15672268883bfd526b392f893789c7149700eeb65a75fc20416f38fdfd3359f2eb2946c01ddc6ca774eb52809b835a758b71c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}