{
  "manageEntity": {
    "action": "Save",
    "entityId": "391927662",
    "entityType": "Track",
    "nonce": "0x9298f0e1adbb79158b174f8328a2bb6a9087aae5a3db6ea30eedd7d2d7102ac9",
    "signature": "0x2a585695431a5848e4f5971c552290a4db0e257e8fd4743d73901e5b3b9598331d888d30d38486ab0f761909f73cd64696b4760bd33981c851146cd7a02329151b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}