{
  "manageEntity": {
    "action": "Save",
    "entityId": "191552963",
    "entityType": "Track",
    "nonce": "0xab0b2c318cdc72b9a8899ad044c80cd7ebe0f1bf1b9cea5d9487abf2ccbae270",
    "signature": "0x050da89d49d3a1049eb014619bcd55186d798a8c7f62a45123e16a31af0d80d228e7d5e9cf9d61a474cd3036e782b1462c7430828df65befa7a0c17635ed27411c",
    "signer": "0xf9e0f98aE94C5dc33fBBB886F0Ec6eeBB2e85358",
    "userId": "48839"
  }
}