{
  "manageEntity": {
    "action": "Save",
    "entityId": "1963400828",
    "entityType": "Track",
    "nonce": "0x029239ee1da650b5276830d04532dd5793464e636098d96bba87e68a3596a420",
    "signature": "0x40ae2c9708cf907b0b31d927d9a7891d7e6cec483f5c154deb2678c2c6fa5a6f69e3468fd32aebf2bf8b3d0be18458b68d4ac3b582d5ccf78819a94af20a685d1b",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}