{
  "manageEntity": {
    "action": "Save",
    "entityId": "912905402",
    "entityType": "Track",
    "nonce": "0x66a3a9eafb9f0f923e1b3a776c42515ddfc11ddee0c8c16028aa7cded78aebb1",
    "signature": "0x3234b4a67469f162533e7fdd0a79c38b65c1eecf7bce942cd8568cbd2b90de4562d7cb84a517a1f117404e1c94074bb1653ea435175cbc5672ebdbb2baf19e2e1b",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}