{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142899617",
    "entityType": "Track",
    "nonce": "0x06505e3076842eb89e902f8f28131bc441efdc60bf405b6ab7969c174f6363e1",
    "signature": "0xe12cccaf1368a6eea2206a79ae4b1c8b3fe47b466a8e923dd9d6dffc0888339a60a91e9ace1126d71b78f49a4e86974e954af4b160a84892f621df089119e3ed1b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}