{
  "manageEntity": {
    "action": "Save",
    "entityId": "1968458714",
    "entityType": "Track",
    "nonce": "0xc62571ba98e12e1d8401ce0778d2bb08917d63c4c25132e79c2b35a257055dfa",
    "signature": "0x4faddc3ea6af457247a1cd3b372b5f27e2a3dea89c4de2928ed5ba23c9c6ae4825457345e16c6075c34b4611a7772e3f4648b5a09d20671f8b9d64a4d0887eab1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}