{
  "manageEntity": {
    "action": "Save",
    "entityId": "913468743",
    "entityType": "Track",
    "nonce": "0xe32808c69952d6f492db5dc9ed4a765728b62c4a619c6ffd961bae6709837a3e",
    "signature": "0x703c41c02b410bebc9aab4b0b12357d2d34cca4b68cf87cc5016846b78e214bf05ef4ee0710dc5efbdddfa05a3b279763c1b1505fe37b3d711417873c90d1dcd1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}