{
  "manageEntity": {
    "action": "Save",
    "entityId": "1750735591",
    "entityType": "Track",
    "nonce": "0x32466457512b32e6f5c1564302751b791479887ce9a9995ab4e209140ed2f997",
    "signature": "0x2e44f2e999f599b707cf3418740089169df932fe4a9ea84e87d9c2fb3c3dacec2dfd10475ac23bacdc1ebd578c1b695f4e89df036902778ccc9210b1a396b6051c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}