{
  "manageEntity": {
    "action": "Save",
    "entityId": "1306589620",
    "entityType": "Track",
    "nonce": "0xa0d33d8f00c03ab193041a7a2177f33d199ff3b4422c8815bb3df7b83290aa34",
    "signature": "0xe8801140c68fa5234050be7a8237001b5fdc18d27a59fdf7275fea3c6f6df88a2004a1745beba9f6e23d6bd9766ca1ecbfa749b62903bee4ef20050e0275f3181c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}