{
  "manageEntity": {
    "action": "Save",
    "entityId": "800629864",
    "entityType": "Track",
    "nonce": "0xf08c431ec7f6ea412f281dc810df810389c7e9dc230db0986773cdf651b4b937",
    "signature": "0x0e83c017553ed3ca4f1de41f2707d4ae64d8d4a9cd066c116b38bf5261e2144a07b0653a20e68db5921e69c7aa6db6daf19211a569f745bc0876caa71377234e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}