{
  "manageEntity": {
    "action": "Save",
    "entityId": "665940",
    "entityType": "Track",
    "nonce": "0xfa8d409c5def4080f0d3e2b0e7ae6cc2ee6348e60ecfa91502c1338d9e9f800a",
    "signature": "0x5c5cbcd7aaa916de4826ca380d0823e6d350d924aca1272f8d7784d7db93a0af346b99df42a7c989109db90bdd7d090df21689b37715d60076780b737a50836a1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}