{
  "manageEntity": {
    "action": "Save",
    "entityId": "1601797093",
    "entityType": "Track",
    "nonce": "0x837c80078c49c2d1d2fa618f35013ae8d826f240e3fbc4559e73639431e4fdfe",
    "signature": "0xfd16554010a9a03b1f7158832ac5c8026c48154a52c6bc44323877b14ccb47a0479117053d926c4613e7d7af159d6e2c2ac7c1494e54b473324ceba54c11f38e1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}