{
  "manageEntity": {
    "action": "Save",
    "entityId": "1564443616",
    "entityType": "Track",
    "nonce": "0xd4b104dca45f643e59bf8e726198ebc67ae4482165c16fe8dce6efafc28caecf",
    "signature": "0x72320d1c3eeb47a133dd37550bb3833b52c7a5c87072c5418b8d3af2b64ecfde53ca8bdd5057bd5ca1663f156eb78238a41e06f68b51dad09c9e9366556df7d41c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}