{
  "manageEntity": {
    "action": "Save",
    "entityId": "1854850717",
    "entityType": "Track",
    "nonce": "0xa211d6b834fc2862fd068e0314072026a0e84634dc69e5358ac58919327f2988",
    "signature": "0x718f188f36309c5f723cce48580f6238832b38d636ed5e08969ac30050e65e404ecbbc68e11382ae56d6d92c66621869e6a063d8810d8d2d8e58c44caa8c87fd1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}