{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758246180",
    "entityType": "Track",
    "nonce": "1786054388166969125",
    "signature": "0xd33e932f902ff42b60429b71d531f14fbf9ed138b8f88a659140f6921b345e0557fde012ab00d10f604138c4a01f04bd7bf852495eeebb479b01f9d82abee9211c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}