{
  "manageEntity": {
    "action": "Save",
    "entityId": "1534863914",
    "entityType": "Track",
    "nonce": "0xabbf894626a09d01b20ae80a4bda824b95fb19e7bd9a42b2c819631cbe6dc5c6",
    "signature": "0x40c4ccc071fb13f15788acd9a4ee88913f8cbd4c715f6bc0119365c171ee4879762e233fc9724ca9c3cfa5dac56fc787f30411ea2c217263396b97dfa54746291c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}