{
  "manageEntity": {
    "action": "Save",
    "entityId": "38411863",
    "entityType": "Track",
    "nonce": "0x68c455ecaffb246d2ea2d672add1b24f7770e1fa4ed09332c6aafd33f0c3272f",
    "signature": "0x0b7a65bad74697e76cc77bdc4bcb21b6aeeda6c16d7afa6405d9876d11de5a6349f4c41734e53c8df1308fcb5f603c938a83ddd8e0476bbe08d3719f32b0ea2a1c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}