{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834272822",
    "entityType": "Track",
    "nonce": "0x503bc0ffe42f2891b3e3e20157e5771823b4f54d0a34c9590325156451e61e83",
    "signature": "0x7a6ce317a91b0763a79b0eb9dd803d06d49f941dd3a8e5a1a2206c3703e229df352072436237bdd0ef8ff2a8f504830f0dbae4ea61d53a292580c2124989660c1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}