{
  "manageEntity": {
    "action": "Save",
    "entityId": "1102777051",
    "entityType": "Track",
    "nonce": "0x38bd76f6bf9ddf7bf56d01c90d4305008b91850e2db550364572f9d9d65b8ba4",
    "signature": "0xe45abd1445278c9bb612937d6e8c7affe94ac55cd1e7ce7fb7df794cca53ebd4299374e0ac142a306ac3ed3f1d86dd47c56aa456cd0a68568751af5ebb6afb831c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}