{
  "manageEntity": {
    "action": "Save",
    "entityId": "1146006245",
    "entityType": "Track",
    "nonce": "0xbb2f5c72ef1668f7ac986315c3d4001aa078891b40a20c42cc6d601d89b9e23a",
    "signature": "0x3a0f229c7dacfa54a327e568d1a9ce3794f47c3ced0da99445623dd0ea10fbc03136ffcc8546467421c1675ab9ee40d4fbca94156abc425e61e67bfe88d33e921b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}