{
  "manageEntity": {
    "action": "Save",
    "entityId": "765565788",
    "entityType": "Track",
    "nonce": "0xb01e00ce83b93f27c2e89f13daa70418dda2ca11a09999615716d3936a0d1ee4",
    "signature": "0x1d58522169a823408175def44cbabf8ce3d9202877835595a591e5920cc4b4a745c2ba19f48d8b19b4db6ea3b82c405eb893b1846d77755e6b1c6f534cef9b8b1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}