{
  "manageEntity": {
    "action": "Save",
    "entityId": "2007278465",
    "entityType": "Track",
    "nonce": "0xf5f877e703fd017db67ad3519cebaf1360b01dd135cacb8266984760960857f0",
    "signature": "0x70de5b100071f2f1b50a65d1d4e667873bd03b3393816d7c55eebc07d78457b8047164982dda0a7d7fa5537d27d3d0315b88b10d31917ec379405a0b6a5d9bee1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}