{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146740265",
    "entityType": "Track",
    "nonce": "0x9ece6e250d06d55d628e896ef9680359ff89550dfa80558b346db516128811f1",
    "signature": "0x67bec37fb598e0a24908b1a023dfb8efd6fc4d7710a5ae485137a9d910217288244bd623bfdabf8b2a05755e30a1dcd039fc958e954faa467611420629722fb31c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}