{
  "manageEntity": {
    "action": "Save",
    "entityId": "1998197592",
    "entityType": "Track",
    "nonce": "0xcf60a8006c0964f558274b288595eae9c4cf94ac720cd204107efbb646df7ced",
    "signature": "0x556ddf40daed3d02aa0a8b7e29a6ca90a37e346462aab3f00719bafd44c69547487a3d9156f037671088af25ddba3507fb7e48a58167687f76e88a6df6967d361c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}