{
  "manageEntity": {
    "action": "Save",
    "entityId": "788905948",
    "entityType": "Track",
    "nonce": "0x7fd71a5fa62a68bb77d493be873ee35855b9ea01b5be6b05eed5222b6dc3713f",
    "signature": "0x59dd012e38d95c98a242fec0ed6da0ffd894fee29165bc047186a9042b728b912113be7f235988ce8c0de8b9d3b50ac1e52b93f687606a4797d44e38e862c3901c",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}