{
  "manageEntity": {
    "action": "Save",
    "entityId": "880932117",
    "entityType": "Track",
    "nonce": "0x73eff0ec38571c140d45ea110b79529dddf2b8f7e4da18ea2345d6b30f0d78db",
    "signature": "0x8eba9df367706421bf58db1188eda29356288528d9252b874eca74ecc4e8f327037b2113df8a1b0e4ef68a959b6a43a6d63754b62f0740f480e8efd3c7f03af81c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}