{
  "manageEntity": {
    "action": "Save",
    "entityId": "466559352",
    "entityType": "Track",
    "nonce": "0x69c141b4b85581e02ee0e73ecc15cd215f61e350378d4dff35cc64258849261d",
    "signature": "0x73cb72cf71ef0a5bf3331b91adf7de84498f5c3e236fe945918e64d7af9be250668004ee551dbf2259ecdbdeb3d9dbf3fbf24848854a9f47525d04577fe3f1a51b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}