{
  "manageEntity": {
    "action": "Save",
    "entityId": "779376969",
    "entityType": "Track",
    "nonce": "0x60f17a12dc7c04dc32b61f2cc3c5d8d4ce8e417d2604a634a852c1f985b88a0f",
    "signature": "0x527ea64fe0eec2d40b299bf2f9d305d6fbe4c188762793de535d8eac6fab1d1f328767a4f0865b6d59fa487d5f8689300172da52b952631a542cde01d752ca011b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}