{
  "manageEntity": {
    "action": "Save",
    "entityId": "656170676",
    "entityType": "Track",
    "nonce": "0x44ba3a717fa2189942f9213ff7361d02a313e7b2e74bb937cb61d66ca1ab5341",
    "signature": "0xea1e781db82cee5e12843752939f91f1d5d03184f7fe01bc8c5098a8479673970bb8faf48d1b8ca33ff92a3b812d11611e0e079e9b5cbea75556e3e202c4fa931b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}