{
  "manageEntity": {
    "action": "Save",
    "entityId": "642140268",
    "entityType": "Track",
    "nonce": "0x99de938c5a287dbd14219aba281cc5666c96bfc1c8fab43cd351cce2bc123c4e",
    "signature": "0x6e9d4600c8f0dc26758728e5b65c1a8f2b96a2f74090de8e37b21caaa9233ece2622955f9de437193aaaf7c88c94b2ff223efbf9bba70b760e2f8d8687d5b1811c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}