{
  "manageEntity": {
    "action": "Save",
    "entityId": "791539818",
    "entityType": "Track",
    "nonce": "0xe425c15fac21c62b78a224cbc724e01c5cc266387249e5b9874119e516248f2b",
    "signature": "0x07d3b4f11dbb52097b9b6696f617247d1e7ce718550227a34a3ac574d2fbdf4d697e73c0d348320d15ee56eabb3c5e0c281064d9e5302c264460360975ff0b561b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}