{
  "manageEntity": {
    "action": "Save",
    "entityId": "2135318864",
    "entityType": "Track",
    "nonce": "0x8a885deb89b0aa64ce526ea924e6ff07eff3ea63bfa651a2555e25fdb34ffe48",
    "signature": "0xd7ce05690593ab86157ddc6976fb433c9df1d2f0a88a0936130e40b69e834599794c2c48fc69915bc92f914c0173f15541740007f15dbca2e75ae201360bfb611b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}