{
  "manageEntity": {
    "action": "Save",
    "entityId": "1891679958",
    "entityType": "Track",
    "nonce": "0xaa64873b471a06a01218f9df78a6593498a2af441297776cd63aa049802accd2",
    "signature": "0x2a88a79d78acaadeef306ad5aaca355b8055de0593e551d7a6358c5247e533723f4a0a9a04c46bb1e8cb09113810331503b68f39509171ca4e1e13ee11338db31c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}