{
  "manageEntity": {
    "action": "Save",
    "entityId": "290151143",
    "entityType": "Track",
    "nonce": "0x932ec4b14c0acfd989d70926650307b8715cb073dc315f4c42a82f86213287de",
    "signature": "0x5d3edc2fdf44b4f622ae63dbc8f724ba84091c9c4a7e90c8158904f785e43b15198c2b1786eac03edeb5a05e8b6870d969adbbc403544e30c4ceb88d31224dc01c",
    "signer": "0x71f27C7be9Dee3862d68272edE051C3f0EF26274",
    "userId": "196285896"
  }
}