{
  "manageEntity": {
    "action": "Save",
    "entityId": "796392409",
    "entityType": "Track",
    "nonce": "0x2cf6528e3b2a508552c0f8f02b870ac7993c3383b0796b1a063a51b9e5877d94",
    "signature": "0xd32a258d6d42f8bfd7f7247eeda9eefc6ba37b95b6a8f954a61ffea10d6dc70c366493c740784ab6e63830d32bf8fd2b9f3a1974910d5e47322d1c0d0fa29b8c1b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}