{
  "manageEntity": {
    "action": "Save",
    "entityId": "326491151",
    "entityType": "Track",
    "nonce": "0x872d57ff45219c28a3f8b34013deb89e3444635be78deb6f57308ca89caf54b2",
    "signature": "0x3247309e9252e507412e5256caa7d957fb2b0e50e06525f389fbb5533b6f934413207c726ef1f41d0564503c09ce4eaf98b4d364532c273abed0b7a777b601d11c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}