{
  "manageEntity": {
    "action": "Save",
    "entityId": "1957629616",
    "entityType": "Track",
    "nonce": "0xcf765094253809c1de168ff981de418f47e08518396223555209ff1a374bd444",
    "signature": "0x868c7901c22f7da2770ca24b7cd8f86e7012f620bbdc7b5594331aba57a04d8826c6633c5d3ddb5b1696ea3cd29bb17ac35406d4e4ea5c46c2f5f9655f9a13041b",
    "signer": "0x1A748d74Db6424f9EA1Ce41A3A445631765103bc",
    "userId": "799948905"
  }
}