{
  "manageEntity": {
    "action": "Save",
    "entityId": "590135298",
    "entityType": "Track",
    "nonce": "0xfbbe2cc5f3664be1820afd545a72cdbe29df7511db42f21bceb433a3fab81e12",
    "signature": "0x780e492918af8b3d4e43d9fb80f46bd14eafe662f91090e91d79c856fa907dbe35d6ddc77141abf495595a54af66963e04056bc4f9747bccee823fa9c5acd5531c",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}