{
  "manageEntity": {
    "action": "Save",
    "entityId": "1482017364",
    "entityType": "Track",
    "nonce": "0x54e71eac05ec66a55e020e361cdf7310b833a4e39071e90f9ed1117d63de7f13",
    "signature": "0x601596b07d20e4181a76ee1bdd5e89c84f0519a0603db77ef75984f9e52a2ee53f557e8770cdefdc206080ad75273cdd37582c0a035bf9b8dc548a81fd5953841c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}