{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662979906",
    "entityType": "Track",
    "nonce": "0xa616ce9ead732acba22434f9df4b1a99d2197a9ea444542e67d105be1d55d3c7",
    "signature": "0x2e75dcf7d931e461f064c34c4720455f48aedb16ec9a1efe89112b905d4c8d1128578f12ef4a03dfb2c272c1d779e1cdf529395726874e3b401f33c184eccdeb1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}