{
  "manageEntity": {
    "action": "Save",
    "entityId": "540032876",
    "entityType": "Track",
    "nonce": "0x3f718127964ef25f53482ec26e25a8928177bb5f7f2dbfcd542f50bcf99afe9d",
    "signature": "0x89d128bd4d670fcf9bb9b010b08db540a1e546c2cf32e6eb5956144c7bfe2d820fd68d00b3079ec64f3641660dbea81c071d8b0c4bbf4db4148f1a515af6b5381c",
    "signer": "0xB83551fDE4C322c789781D4f10A3d0E29De29829",
    "userId": "561032968"
  }
}