{
  "manageEntity": {
    "action": "Save",
    "entityId": "1058848429",
    "entityType": "Track",
    "nonce": "0xcf297025fc0fa27f8501c2de6645ab2741a7e8594625bf2f55e68d26ded73675",
    "signature": "0xe1e8d01c5c0cb82fd1ee0aad426ae50c744951d835e5e8f926755576a3d2d1e74dbb7f317bf8070c5e278665bc1ff4dd67ecc2365dc69228df3250472b1a324c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}