{
  "manageEntity": {
    "action": "Save",
    "entityId": "717646396",
    "entityType": "Track",
    "nonce": "0x141ad5931c73317be909120b9bff123b1ff308c572d91afde0591f063bea103d",
    "signature": "0x10db6c4ae80c216fde38e433d0648af1ad2f0bf6a1f9a8c243f32f91cd6022165eb89e087cb6bc930a939bbd5faab949c697e32c208ded44e58d36b571c1f8fc1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}