{
  "manageEntity": {
    "action": "Save",
    "entityId": "1261890626",
    "entityType": "Track",
    "nonce": "0x848b6d9468fcd4e4f1ed03cabe8b445b73daa2aa76bcb14bead434ac7b7ed87c",
    "signature": "0x308ef5f69de0ffde9cd0658a0e5ad2e9f511f8efe9d2075607a529e028740eb752e9bfe2414992fde0aac4377b5b874a80a998cd0e43f20e2cecddb61b6fe03d1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}