{
  "manageEntity": {
    "action": "Save",
    "entityId": "1987297755",
    "entityType": "Track",
    "nonce": "0x358d908836701a5c5db31f8fee3b90a3fe2e25b6cd7be991c36df5456c7e2fe2",
    "signature": "0xabdb6345d9e09ef18ac47900833216d82818133a3227285433b3c96895c5b5da05046156bcf36a73a35794d42c85d529f9b8d22ae06c24259f0ee015a20fa8da1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}