{
  "manageEntity": {
    "action": "Save",
    "entityId": "888173984",
    "entityType": "Track",
    "nonce": "0x85642e243e07f5f45e683b27daeae49bc0a38d462f5534a6c4c6f3ac5980bb29",
    "signature": "0x357bd2f66f0ee4e05f645ceb94c119222bc06a10d9299605d9abab08c33d7cb051bb6ac3e6df5d1fe562de1cf11b37c00015c0511a6f8619f152131e4d41ec221c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}