{
  "manageEntity": {
    "action": "Save",
    "entityId": "802532935",
    "entityType": "Track",
    "nonce": "0xee293c3964cd30ac218a3287a9d2ef9692a95fbf2ac24466af14e723ec0f7bbc",
    "signature": "0xfdd44b419f2ec3029cb0b5abcdb5c9b6848df419d30de5ab5de35c3b204fd9f5632d8e02e9c98f28fb6087b177a39748072cf4b544a3a8a09574e1f14bdda21f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}