{
  "manageEntity": {
    "action": "Save",
    "entityId": "41844198",
    "entityType": "Track",
    "nonce": "0x1cb5141d1664ea8d6456193834285fd36911e016652c9eb8118c7ecc8be75a16",
    "signature": "0x99c1efe95a5f44fbfe8acbd281cef00d0d51a11663ae3eb6868ce3664288a68651007aa36dc78d09567c7b70aea677e3cc174abb41b3c2ca726e93a6a30604b91b",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}