{
  "manageEntity": {
    "action": "Save",
    "entityId": "875323663",
    "entityType": "Track",
    "nonce": "0x610a8f176eedbdacc84a441650274ac26e7a407a832d89607a752a856649ff96",
    "signature": "0x0db655da530eb36b415d167ca412d3f12c0edbefe994cb957a034af3b138d9ea0b2789ba136404826d3df5934916480dfa22c61c69b356a20c2ec0bbdd85479b1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}