{
  "manageEntity": {
    "action": "Save",
    "entityId": "2077715915",
    "entityType": "Track",
    "nonce": "0x23ad0b87aa9b17ade2262f39153a7d7bb1d64525378356bc61cbe6d808802bfb",
    "signature": "0xa21fe2262a813ef358b3acc28fcb98f1d309357a59438a2baee3c5883a53fde85334d799d1ed117905040125c63134b38bafd1c5e56712338e216f73a847d73b1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}