{
  "manageEntity": {
    "action": "Save",
    "entityId": "790568737",
    "entityType": "Track",
    "nonce": "1785973346255009153",
    "signature": "0xbd526f3cb12957399185e0e2722114d3f12798cbd0976a02ee4b5e8d6be294fe4eeda3d36a9652cb6642a181f0f5474f864c0391b82341394aae922371b89cc31b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}