{
  "manageEntity": {
    "action": "Save",
    "entityId": "297673943",
    "entityType": "Track",
    "nonce": "0x317009ea4c82a3348da21da545cfecb7348e4e40559d726317af61d73ad4db69",
    "signature": "0x02a2d98cd59914edb96817c5a9f9ec0f63919e61a0f34472a36a15ae91303e1963f084df85aee5a5f320293cbfcbc3e2f807955a666762230e05fc24d38907c51b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}