{
  "manageEntity": {
    "action": "Save",
    "entityId": "2144219159",
    "entityType": "Track",
    "nonce": "0x54320ff3c6eb00b33a7e8365377b24e07d2b506442aeef80a9794f54d71f2ada",
    "signature": "0x47f4b2f49d4ac36a189fbc1ce396f4d5821313c6f7903141d41432b10d3e75906aa6d4d0ad178dfda3e26d544767a7fd154eacaf07229e49a6b7147d73ac26951c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}