{
  "manageEntity": {
    "action": "Save",
    "entityId": "1836318639",
    "entityType": "Track",
    "nonce": "0x4ee2cffde556335f33c3ca51b08fadfe934075c24a51acd85d7d0d3f96f90f14",
    "signature": "0x596547d4fc312e40d65f3126453acb32db49a7b1c79a3ddc2d701e060fd7eaac6ce071e2c37fa34335327c79a4ff1edde0b7649162eea45d2d28647fe4cc1b9c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}