{
  "manageEntity": {
    "action": "Save",
    "entityId": "2124864645",
    "entityType": "Track",
    "nonce": "0x6223ecc04ef0d76b85e2e9dc471277b4fc4d2a1bddcd2cfb65d97fa782d3136f",
    "signature": "0x263f8df08294753242e63db3c5398354827eba64e25ee9c2ddec4a014afe4a553f450254d5d6b9ea75c2088e5f9b395208206586b100c0da562aa2b61d19225a1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}