{
  "manageEntity": {
    "action": "Save",
    "entityId": "679951478",
    "entityType": "Track",
    "nonce": "0x7a2a3302be19b82fb10a02377e58142694cbce17c2e63528adc65967f6a382d1",
    "signature": "0x3d1291b8ca14ad7215b565fdd94c58758aee3f4d062bf43703733817eeb52ae847e9807f80f8420b871f2985d19ce08c6ef4c7271295b120871f279275a54b1a1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}