{
  "manageEntity": {
    "action": "Save",
    "entityId": "804742415",
    "entityType": "Track",
    "nonce": "0x6ea568de52049b35d2c403774d202c647667408e331ec5e24d30c726145a58c7",
    "signature": "0x3182be3b5738eae882eba61d8dce33083c206ef183430c1f2bb1a8b9bae565ad20299d3cd01dabe4dae4a84bdbccad937278aa32c8d0802b5316f9a500a83ed11b",
    "signer": "0x14fa63A530B7d9254d20B110AAc25ABF49fbfa9d",
    "userId": "182428"
  }
}