{
  "manageEntity": {
    "action": "Save",
    "entityId": "2101654740",
    "entityType": "Track",
    "nonce": "0x3a18f5003ee78d5aecd12a025b87971b18e37b88bb1ea72cd2f55c3f1ca1f0e1",
    "signature": "0xdda99df63d497dd1ea7a748aab3a57b256c1a224bdedf84d71685ea50af77ee235d0b28f1b68c1f24a9f0ad6bbdd28075fc33d596084f327702c52abdffdbc791b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}