{
  "manageEntity": {
    "action": "Save",
    "entityId": "1826083649",
    "entityType": "Track",
    "nonce": "0x86c9e7d30ec04d42f7719a7c96ec2706adef87437a139cc314e42df39e759d14",
    "signature": "0xb1695f164ad1571045b65bc2ceeecd9578ddcbeb6f309c3e93c2b0f530ef609e4dc3aaa14e826a8913cc6f4bc036e38756d83a1ac0cafc17c4f9faf4bb14a0ad1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}