{
  "manageEntity": {
    "action": "Save",
    "entityId": "498092501",
    "entityType": "Track",
    "nonce": "0x2ffc5084ed5a87323d8f7dc21690dcd13f8448f5e05e0fb0a4c9f52af16a4ab2",
    "signature": "0x2de910262921063f077ab287c52fa467fe82f91e9752882a5e7fa84a686379db5f1504804e69e65d6cbe5a6194a724d96364fffc5b0ec79f88180e6c3268c7ae1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}