{
  "manageEntity": {
    "action": "Save",
    "entityId": "463003087",
    "entityType": "Track",
    "nonce": "0x3d62ab1c6898fc6fdb4c808f9a6b81bdb01af0a1882051329c4f9552115af5ab",
    "signature": "0x3c5408acf6d81dc17c6bc19d4b58491ee631a9ed2fdc976bddf8eeb25047f89a0a6ff64e6f53987bd55f3bc8bf2a0c88ff0073a50c4e3c255c84f4d8bc4445a41b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}