{
  "manageEntity": {
    "action": "Save",
    "entityId": "275815",
    "entityType": "Track",
    "nonce": "0xff6ceb926e4b064ae24ed41ea72e3eb3f762513373d8389c9d13d2318d5f2ce3",
    "signature": "0x7b05e772af7cde568961755dc4ae546f653196426c343f2d9005fcb6d9f0f25d345fad14f7fa54d74c9667e44b83ca9d1d935b3d3f28fd288e6dbf48465cb9941b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}