{
  "manageEntity": {
    "action": "Save",
    "entityId": "577009918",
    "entityType": "Track",
    "nonce": "0x0e95a2f9ef242c3b20340d3b99a88e6ce4266130023f5c69e7ef43397c35ba4b",
    "signature": "0x9054b503019fb9448e6c8aab242ef783196da705f1deb86410216fcbd94fbcae76cbabaa9b3c2a0f34a074d12d0d6efc9a6bea016639a758abe3f7c8470289981c",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}