{
  "manageEntity": {
    "action": "Save",
    "entityId": "1976571413",
    "entityType": "Track",
    "nonce": "0x07d289e74500c12384323c5643a3252fd578762e994ff9d5a4b1d8c662274a43",
    "signature": "0x91f18da01b1182e859a875c11c7ab3ea4df005073d3186957b5abdb59eb6b05e46f8cec92e8267b10a4359d26c9b87d6e243b5bcf32d69a1a86df91e8db2fa151c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}