{
  "manageEntity": {
    "action": "Save",
    "entityId": "2138028025",
    "entityType": "Track",
    "nonce": "0xd62b0e007bcf09de666ea59cf49e594957e96eaf632b3e231d6651fe1d5db9ab",
    "signature": "0x2c6f54cf3e673d0206ab7d7f5b66315e215e662cea45fa53328734392420b8b8297c5ee60174b357a6f3cd09d3d72a42fdb39e595c16c424737077a571ad02941b",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}