{
  "manageEntity": {
    "action": "Save",
    "entityId": "348734",
    "entityType": "Track",
    "nonce": "0x6a095f58e9f64df024a398ba2e8418fb88f9f506fbb726e3bfa2c3eafacf1d99",
    "signature": "0x6c8a6a7b6e5b83396b29b3fa4a819cc11124231cb051fa12c3785d0f47e5b9ac69784895b035d3ced5058dbd766e46fd694ef9b0e9bc6f8bf38510fb4a975fe21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}