{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029866888",
    "entityType": "Track",
    "nonce": "0x5b5bbf712ba315369b140ad3efd6ae60f4bec7e77e55bbba673b878dff1d054a",
    "signature": "0x6fba4c99efeb87cfe9d34d3db5e24a5a93cd0dd496411b95148ed6dccb359d1b4da0301c9017eabaa4f2bb08a25563d4650057b5e406c1f07890addd819d6fc71c",
    "signer": "0xEf3d3c6df875c67aa35e9F473e01a47D659c95f9",
    "userId": "814929010"
  }
}