{
  "manageEntity": {
    "action": "Save",
    "entityId": "1816241564",
    "entityType": "Track",
    "nonce": "0xbaa1752fa54a91cc0a6b75d6bb7bb0c611ef5c7926d31fedcd6798fb03f0a9e0",
    "signature": "0xba8a3fc047bcc3f710481127f9a740366ffef0790a916d506fa23c5e86b89def741d4bcd993d1b18f83b374ac597838945bed16808222363c129b284c9ecd4fc1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}