{
  "manageEntity": {
    "action": "Save",
    "entityId": "2058308406",
    "entityType": "Track",
    "nonce": "0x974f6a1001502d70e0210f3bc4d3abc9b1639f94ff7a661557a3098dfb4881cc",
    "signature": "0x51b2fa295c2cf793974d1c090fb5f600a8acf3f96ff81f417ae0561d4da7891f7d4e03c940a845b9056d968562fcf93a5b5abd3470625696071191c554e7df5d1c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}