{
  "manageEntity": {
    "action": "Save",
    "entityId": "1877382842",
    "entityType": "Track",
    "nonce": "0xb0b7b33e9adc482f0d140c4dbb93de6c6090e210c92984c030f4885b0655a94c",
    "signature": "0x563d7affd367db6869395c02adb4bb2e9ac295a189b3ea80f0d4bc92bc64060718b8b3a02acb9f565de7d8e24586017c400d6d4592e4b8336ea7004a26ac44951c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}