{
  "manageEntity": {
    "action": "Save",
    "entityId": "831680607",
    "entityType": "Track",
    "nonce": "0xde663f8a2d81cc6b50decede4adf783e3e0f0e6ec40051fc699ed75299740ef9",
    "signature": "0xf58d13b8e2178825e8814e4a4b5d843672c3289360fed69de24690b4a200898d4d1b677137638fba16303caddc3a0296f8586f45d6992ce9186b823373b4ff381c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}