{
  "manageEntity": {
    "action": "Save",
    "entityId": "202943805",
    "entityType": "Track",
    "nonce": "0x34adfbfa7688658c07fc4f31d2a7467fd218f35be4d25abcd1ecdb9bf397aea6",
    "signature": "0x0fe130928fb2ca1e9f1a22651c5faf317bd44921b064041f748fb66c22579e8d72a33ebaa092fbb15b91dfbeb2d973c51b1e76fde5950ac83470600efb9af8891b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}