{
  "manageEntity": {
    "action": "Save",
    "entityId": "1690350467",
    "entityType": "Track",
    "nonce": "0xa6150769648da625c981d17c56ddaf4a987e733f4c6a871b11a243c06dfe5df6",
    "signature": "0xdcff11c207ac0e5f73507a0ff63fe527f826494b822f88d597783c51aab221794b6ce598cd9b8b4f56f74ef2f9dd421f8c2eba60411785548cc3f6d0099450411b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}