{
  "manageEntity": {
    "action": "Save",
    "entityId": "1154356649",
    "entityType": "Track",
    "nonce": "0x947b55babbf4f2b22c923245fc580be28e3fc260f820f8cd0781f7e4719d95a1",
    "signature": "0xfa16d4bd548f88cd03428bce8a2fdb5c1ba5450d59be424243c9e2144998baea70f16a5fb701c950c3400bf148d414b1b9086f3efed3c279eca88804b591157a1b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}