{
  "manageEntity": {
    "action": "Save",
    "entityId": "1894209304",
    "entityType": "Track",
    "nonce": "0x2778af01d59032a6a3ff5b85d39fe1985718f694fdb4f4b52f67841df8f4af6c",
    "signature": "0x5e4deea8f91d12752d31be9370639d6e6bc177c3b70bda6032cd6d7e84eefb9a713cb29fe1f3092cc7d6aa5a2f06c57f4a369d7c6f3f427023f13809f14e9fa71c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}