{
  "manageEntity": {
    "action": "Save",
    "entityId": "1534863914",
    "entityType": "Track",
    "nonce": "0x77cf9117ce9e79cf6b199fd0ee185702312b22b139f24443c5fc13ebcf159115",
    "signature": "0xa2bfe4f4b2c6492842127e34d5a5edd7f0733f4c0fa0d3e28cf4805fad0dadf739f3130273e4c63440b652f8472cc6858ac5a2288bbca03aed6ed017433f035a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}