{
  "manageEntity": {
    "action": "Save",
    "entityId": "106518728",
    "entityType": "Track",
    "nonce": "0x551776a95b81b546a1d03ab574e1519ad4f6d83da6bf0da956445cb433887f23",
    "signature": "0x5d990c1bcb4de534c00cf910afe19054b7ca9d1077d0ae4b3a2b84178c1b0e6f479201aa28b75e7768e2fcd2b3e21a25bdb827a6bb4ec888e9f9b1e3a1f20c501b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}