{
  "manageEntity": {
    "action": "Save",
    "entityId": "179498681",
    "entityType": "Track",
    "nonce": "0x68d50bebf46dfb68572d3a0507fd09eb866c3c89431494e5cc0cea081b230dc4",
    "signature": "0x0d9f2f6efaf5798704cd7a8cbaa25a40da61d0077d630b69b331690ecf948b313bcfb650585c7f65cf01c722970c2297481fe07aada6144ecca972f38d4012ba1b",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}