{
  "manageEntity": {
    "action": "Save",
    "entityId": "1139520534",
    "entityType": "Track",
    "nonce": "0xf58cf70544ef5f9bdf03b7fe5af21131f7bd6eb8874ed3573d0d94de96b664ac",
    "signature": "0x0e9babaaec6df3ec577535f3ef00cc558ef84b6f3fcff928d6a44dbb64cb982624326e95b60659a1c592ff3d0152aa700242be4d9e44ecc69562ec385e1c78611b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}