{
  "manageEntity": {
    "action": "Save",
    "entityId": "360901",
    "entityType": "Track",
    "nonce": "0x46e3f276de3f98e684faab054e011d7f1d2a01462e42657d5a498a6ece9057ea",
    "signature": "0x82246512d607a241ad8baff38452d7d43ea869a4d1789e26d2fbf31e9409da1a2b8842ad418a02231429e990724c18f72e01961cc1aaadd39c2e9b1806e882931b",
    "signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
    "userId": "599751364"
  }
}