{
  "manageEntity": {
    "action": "Save",
    "entityId": "683337",
    "entityType": "Track",
    "nonce": "0x72a47432ffc7f775a2c72267e257b75ea59871266fbad083834a1ce7569dee5d",
    "signature": "0xe621b63b51a845e8cbe9741e9cf7cef5a77d31922966e852d96b970d74c9698956a124e95671bae061bd243af7eeef9d45e8c5c05fffa13f6db737da92f32cbe1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}