{
  "manageEntity": {
    "action": "Save",
    "entityId": "2074666236",
    "entityType": "Track",
    "nonce": "0x2165321a2cb423c4de419e88288ecdc666d8e312fcf8970fbb68105db10a8168",
    "signature": "0x27f01668cc0c55b6069264ada78df5e491e56cc8c5c927b464a77d02dd0313be0c7a7cc2839728768dc10ac6154cce6a7b52ba64f301f429b61556348930595b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}