{
  "manageEntity": {
    "action": "Save",
    "entityId": "431963",
    "entityType": "Track",
    "nonce": "0x3ce4ae25a22d0de07cd6a76b9751eefb3486f4c6427f3d9572db62fd5714dc26",
    "signature": "0xbc5ceccb49f1590f89288f1901e1048645c15f243619d95f157e1eac39990cc10da5bad642722ae77a58e80463082bd919cb05b3b66ff9ca1de643d73f3abef21b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}