{
  "manageEntity": {
    "action": "Save",
    "entityId": "115377965",
    "entityType": "Track",
    "nonce": "0x74b811bb299b09b9903b14d98defa139f4dec2b2d6618e536c05c0195fcbb463",
    "signature": "0xf1097f1a79e906a9ee4b15f4392c595b37377c420b883c352d3d60dccff4f187304cafff404b58f629d3df6682f2ffd8664fc09b2b07a4a9f73a58afabcc3ed61c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}