{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768825404",
    "entityType": "Track",
    "nonce": "0x9a0d8eb5a1e2f4770ae42a9b58367cba741f725dc56d43ecee44d852cc50af62",
    "signature": "0x0fe7c41f0b13ed182895b788c021e8f4d5c12cbb86216783dd663d0c32a379fd0253d2e174f14f4e4e64252a38d5b2f7064023859b587927a853f8193f69a8ce1b",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}