{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922447354",
    "entityType": "Track",
    "nonce": "0xd490488d76529dab1d7f7a6295a86b9c67f736da477018ddf2b6b9bc6f87096a",
    "signature": "0xb253785be8b48776d56a823c8562cae568f156a20da3acd00e2d3658212ff0387b179d614bfb675d8b4660b9ac72da63914e42aecd56e685c2dee9b78dc0d47d1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}