{
  "manageEntity": {
    "action": "Save",
    "entityId": "2061137709",
    "entityType": "Track",
    "nonce": "0x5a91a270506d4c07de7acc76d3dca451c3ab941d6db68e334574765eb4096dc2",
    "signature": "0x6b80222c187505f517442739b9d4adcc3b7ca467744d4af2c30889806a952c5954f15e999149541d8d36ce0dc9114cd8b40340e7c51031c3553e44edfc8889eb1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}