{
  "manageEntity": {
    "action": "Save",
    "entityId": "572097249",
    "entityType": "Track",
    "nonce": "1793794927601295423",
    "signature": "0xbd977b0cb509955dddd77bdf030a22fabe8b3dd93aa90d028ced70325727460b305a5a6c64d4dc3a9e70391d81ed45c53d38a6e89f4eb46571b9ff228dac09d41b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}