{
  "manageEntity": {
    "action": "Save",
    "entityId": "1478351660",
    "entityType": "Track",
    "nonce": "0x48ef48b7ca3c8155985083aa6a264d0698ed65ddeeedd174cb3ce8ce83382977",
    "signature": "0x35c151b485c821ed2eb2cdc2cabb2d32a5e3b878f5994ac4afdaf5b5a7dc2e3c34e429567026f232af6fb155108c6b0bc3b959116329482ac11afcb7d80fd1f21b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}