{
  "manageEntity": {
    "action": "Save",
    "entityId": "570586168",
    "entityType": "Track",
    "nonce": "0x4ea6d7a466bbc27f0f8b0aaaeeb94ae7ac8b9c057c3f906fe8ab713db800417d",
    "signature": "0x01a41065c173719cbb62887d5c31065ab3514a4652d2c2a39ddf2c93da12921d6d226ec860e58bb51c2bd912e4a3ff49380e8bdc0055140c653e3bda6a2533d41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}