{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580981621",
    "entityType": "Track",
    "nonce": "0x0795739bc968961d5345f2a8ac2b3fd90441002d810e77e87ee67e2bfa533c59",
    "signature": "0x18448deb4a67eb3c4b99a8a14ef9c1ebef86d886c79f76eae09c62fd6acc8b2a5d41194d70f876a98de652e13a5b93c9669e678d13adebe687d40ccbb9b839c81b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}