{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075793431",
    "entityType": "Track",
    "nonce": "0x3192c9be600fecc7e6fa381e7d64975dedd623749ef7a49d80bd618b2b15cc15",
    "signature": "0xbc9369303f877caba99485c9caf993cc2c96a69b6e1080e73d4fb6b934b604b24da84e1512f1c9145b183e4f03aa4815d0a4dc7054fcd9150b51ba9328d1507e1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}